Originally published on ColdCaseTech.
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Then vs. Now (News report): Then: Kuxiu lists the K4 Air as a 3-in-1 MagSafe foldable charging stand that folds to 102.7 × 64 × 8.5 mm and weighs 120 g, with 25W for a phone, 15W for earbuds and 5W for a watch. Now: 9to5Mac reports the K4 Air is back in stock after a limited initial run and costs $79 on Kuxiu's website in Space Gray and Burgundy.
9to5Mac published a hands-on review of the Kuxiu K4 Air on November 15, 2026, describing a 3-in-1 MagSafe charger that is 8.5mm thin when folded and can charge an iPhone wirelessly at up to 25W (9to5Mac). The reviewer reports it is back in stock after a limited initial run and costs $79 on Kuxiu's website (9to5Mac). Kuxiu's own product page lists the folded size as 102.7 × 64 × 8.5 mm and the weight as 120 g (Kuxiu).
Key Facts
| Item | Detail | Source |
|---|---|---|
| Folded thickness | 8.5 mm | Kuxiu |
| Weight | Less than 120 g per the reviewer | 9to5Mac |
| Charging outputs | 25W phone, 15W earbuds, 5W watch | Kuxiu |
| Price | $79 on Kuxiu's website | 9to5Mac |
| Colors | Space Gray and Burgundy | 9to5Mac |
| In the box | Cable, travel pouch and 45W charging brick | 9to5Mac |
Timeline
- 2026-10-08: Kuxiu's product page lists the K4 Air in Burgundy with a Black Friday offer (Kuxiu).
- 2026-11-15: 9to5Mac publishes its hands-on review of the K4 Air (9to5Mac).
Details (as Reported)
The reviewer spent a few weeks with the charger and traveled across the Atlantic with it (9to5Mac). For reference, the reviewer's iPhone 17 Pro measures roughly 8.25mm thick, while the K4 Air comes in at 8.5mm (9to5Mac). The review describes CNC-machined aluminum, a magnetic main surface for the iPhone, a second surface for AirPods with added magnets, and a dedicated Apple Watch charger that fits an Apple Watch Ultra 4 (9to5Mac).
With an iPhone Duo opened in landscape mode, the reviewer reports the phone tilts slightly to the left, while portrait mode works well and a folded iPhone Duo charges on a nightstand without issues (9to5Mac). The reviewer adds that the form factor can technically charge two iPhones at once (9to5Mac).
Kuxiu states that the stand uses 32 N52 magnets, is UL, FCC and CE certified, and includes over-current, over-voltage and over-temperature protection with foreign object detection (Kuxiu). The company offers a 2-year warranty and a 30-day money-back guarantee, and says orders ship within 1 business day (Kuxiu). Its Black Friday offer uses the code BLACK26, and buying 3 or more items unlocks 20% off automatically (Kuxiu).
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What Is Not Yet Confirmed
The sources do not list open questions.
Sources
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